ellanetworks/core · Security
Ella Core has handover failures during concurrent Security Mode Command
- GHSA ID
- GHSA-mc29-hmx6-856q
- CVE ID
- CVE-2026-44474
- Severity
- low
- Published
- Updated
- CVSS
- 3.7 · CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
- CVSS v3
- 3.7 · CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L
Description
Summary
Ella Core didn't enforce security rules on concurrent running of security procedures defined in TS 33.501 §6.9.5.1 — it could send a NAS Security Mode Command while an N2 handover was still pending (and vice versa).
Impact
Concurrent Security Mode Command and N2 handover produce a KgNB mismatch between the UE and target gNB, causing the handover to fail. Requires a stalled gNB + re-registration race to trigger.
Fix
Ella Core now enforces both rules from §6.9.5.1, blocking concurrent Security Mode Command and N2 handover procedures.
CWEs
- CWE-358 · Improperly Implemented Security Check for Standard